Chromium-hexavalent
CAS Number
18540-29-9Synonym
Chromium VI; Cr6; Chrom 6; Hexavalent chromium; Soluble hexavalent chromium compounds
Occurrence/Use
Production of stainless steel, textile dyes, wood preservatives, leather tanning, anti-corrosion and conversion coatings, electroplating
| Last CHHSL revision: |
01/01/2005
|
|---|---|
| CHHSL Comments: |
For chemical-specific screening levels for use in assessing contaminated sites, please see HHRA Note 3 (DTSC HERO). https://www.dtsc.ca.gov/assessingrisk/humanrisk2.cfm |
| Latest Criteria: |
California Public Health Goals
|
|---|---|
| Inhalation Unit Risk (μg/cubic meter)-1: |
1.5 E-1
|
| Inhalation Slope Factor (mg/kg-day)-1: |
5.1 E+2
|
| Oral Slope Factor (mg/kg-day)-1: |
5.0 E-1
|
| Last Cancer Potency Revision: |
2011
|
| Comments/References: |
OEHHA 2011. Public Health Goals for Chemicals in Drinking Water: Hexavalent Chromium (Cr VI). Note: For Hot Spots risk assessments use the Hot Spots values. |
Air
| Chronic Inhalation REL (μg/m3): |
0.2 (inhalation); 20 μg/kg BW-day (oral)
|
|---|---|
| Chronic Target Organs: |
Inhalation: Respiratory system. Oral: Hematologic system
|
| Human Data: |
No
|
| Last Chronic REL Revision: |
2001
|
| Chronic Reference Exposure Levels Comments: |
Proposition 65
| Cancer: |
Currently listed
|
|---|---|
| Reproductive Toxicity: |
Currently listed
|
| Listed as causing: |
Cancer
|
|---|---|
| Date of Listing: |
02/27/1987
|
| Basis for Listing: |
Labor Code
|
| Listed as causing: |
Developmental Toxicity
Male Reproductive Toxicity
Female Reproductive Toxicity
|
|---|---|
| Developmental Toxicity | |
| Date of Listing: |
12/19/2008
|
| Basis for Listing: |
State's Qualified Experts
|
| Male Reproductive Toxicity | |
| Date of Listing: |
12/19/2008
|
| Basis for Listing: |
State's Qualified Experts
|
| Female Reproductive Toxicity | |
| Date of Listing: |
12/19/2008
|
| Basis for Listing: |
State's Qualified Experts
|
| Cancer | |
| No Significant Risk Level (NSRL) - Inhalation: |
0.001 µg/day
|
|---|---|
| Reproductive Toxicity | |
| Maximum Allowable Dose Level (MADL) - Oral: |
8.2 µg/day
|
| Last NSRL/MADL Revision: |
2010
|
| Reproductive Toxicity: |
|---|
Public notices related to this chemical:
- Proposed Amendment To Section 25707(B), Route of Exposure: Hexavalent Chromium (VI)
- Notice of Amendment to Section 25707(B), Route of Exposure: Hexavalent Chromium (VI)
- Request for Relevant Information on the Developmental and Reproductive Toxicity of: Bisphenol-A, Chlorpyrifos, Chromium, DDE, Sulfur dioxide
- Hazard ID Materials for Hexavalent Chromium and Chlorpyrifos, Submission of Relevant Studies for Particulate Matter and Total Trihalomethanes
- Amendment To Section 25805 Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity: Chromium (hexavalent compounds)
- Proposed Amendment To Section 25805 Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity: Chromium (hexavalent compounds)
Water
| Health Risk Category: |
Carcinogenicity
|
|---|---|
| Public Health Goal (mg/L): |
0.00002
|
| Public Health Goal - Download: | |
| Cancer Risk at PHG: |
0.000001
|
| MCL value (mg/L): |
0.05 for total chromium
|
| Cancer Risk at MCL: |
Not Available
|
| Last PHG Revision : |
2011
|
| California PHG Comments: |
The hexavalent chromium MCL of 0.01 mg/L (established July 1, 2014), by court order, is no longer in effect as of September 11, 2017. The previous MCL of 0.05 mg/L for total chromium remains in place while SWRCB develops a new MCL for hexavalent chromium. |